Determining which film is “better” depends entirely on the specific application and desired properties. Each film (BOPP, BOPET, and BOPA) has its own unique strengths and weaknesses, making it suitable for different purposes.
Here’s a comparison of the key properties:
| Property | BOPP | BOPET | BOPA |
| Clarity | Excellent | Excellent | Good |
| Gloss | High | High | Moderate |
| Tensile strength | High | Excellent | Highest |
| Tear resistance | High | Excellent | Highest |
| Moisture barrier | Good | Excellent | Excellent |
| Chemical barrier | Moderate | Excellent | Excellent |
| Puncture resistance | Good | Excellent | Highest |
| Heat resistance | Good | Moderate | Highest |
| Cost | Low | Moderate | High |
| Versatility | High | High | Moderate |
What is BOPP film
BOPP film is a biaxially oriented film of polypropylene (PP). It is a transparent, strong and durable film with good barrier properties.
Pros: Cost-effective, excellent clarity and gloss, high tensile strength and tear resistance, versatile.
Cons: Moderate moisture and chemical barrier, lower puncture resistance than BOPET and BOPA.
What is BOPET film
BOPET film is a biaxially oriented film of polyester (PET). It is a transparent, strong and durable film with good barrier and optical properties.
Pros: Excellent clarity, gloss, tensile strength, tear resistance, moisture and chemical barrier, good heat resistance.
Cons: More expensive than BOPP, lower puncture resistance than BOPA.
What is BOPA film
BOPA film is a biaxially oriented film of polyamide (PA). It is a clear, strong, durable film with good barrier properties, chemical resistance and heat resistance.
Pros: Highest tensile strength, tear resistance, puncture resistance, and heat resistance, excellent moisture and chemical barrier.
Cons: Most expensive, less versatile and readily available than BOPP and BOPET.
Conclusion
Therefore, the “better” film depends on your specific needs and priorities. Consider the required properties, cost constraints, and desired functionality when choosing between BOPP, BOPET, and BOPA films.